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Beckhoff KL1904

Bus Terminal, 4-channel digital input, 24 V DC, TwinSAFE

MPN: KL1904
Category: KL1xxx | Digital input

Price and lead time confirmed within 1 business day

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12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
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What is the Beckhoff KL1904?

The KL1904 safety Bus Terminal is a digital input terminal for sensors with potential-free contacts for 24 V DC and has four fail-safe

Specifications

Connection technology	2-wire
Number of inputs	4
Protocol	TwinSAFE/Safety over EtherCAT
Response time	typ. 4 ms (read input/write to K-bus)
Fault response time	≤ watchdog time (parameterizable)
Current consumption power contacts	–
Current consumption K-bus	48 mA
Installation position	horizontal
Safety standard	DIN EN ISO 13849-1:2008 (Cat. 4, PL e) and EN 61508:2010 (SIL 3)
Weight	approx. 50 g
Protection rating	IP20
Ex marking	ATEX: II 3 G Ex ec IIC T4 Gc IECEx: Ex ec IIC T4 Gc
Design form	compact terminal housing with signal LEDs
Material	polycarbonate
Installation	on 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means of	double slot and key connection
Marking	labeling of the BZxxxx series
Wiring	solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver
Connection cross-section	s: 0.08…2.5 mm², st: 0.08…2.5 mm², f*: 0.14…1.5 mm²
Connection cross-section AWG	s: AWG28…14, st: AWG28…14, f*: AWG26…16
Stripping length	8…9 mm
Current load power contacts	Imax: 10 A
Dimensions (W x H x D)	12 mm x 100 mm x 68 mm

KL1904: frequently asked questions

When can KL1904 be shipped?

KL1904 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up KL1904 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for KL1904 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for KL1904, subject to availability and destination.